Copy palette from source data if type is PALETTE COLOR.
Add the GeneralEquipment and ImagePlane modules.

The GeneralEquipment module is straightforward, but the ImagePlane
module will have to take care of items like whether the image rows
are bottom-to-top (as most VTK images are).
Fix the Secondary Capture SOP UIDs written to the files.
Add a DICOM generator for MR images.  Far from complete.